An overview of the Oyashio ecosystem
The Oyashio shelf region and the seasonally ice-covered areas north of Hokkaido are highly productive, supporting a wide range of species including marine mammals, seabirds and commercially important species in the western subarctic Pacific. The fishes include gadids, such as walleye pollock and Pac...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Online Access: | http://hdl.handle.net/2115/33067 https://doi.org/10.1016/j.dsr2.2007.02.007 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/33067 2023-05-15T17:59:40+02:00 An overview of the Oyashio ecosystem Sakurai, Yasunori http://hdl.handle.net/2115/33067 https://doi.org/10.1016/j.dsr2.2007.02.007 eng eng Pergamon http://www.sciencedirect.com/science/journal/09670645 http://hdl.handle.net/2115/33067 Deep Sea Research. Part 2, Topical Studies in Oceanography, 54(23-26): 2526-2542 http://dx.doi.org/10.1016/j.dsr2.2007.02.007 Oyashio physical and chemical oceanography ecosystem properties fish and invertebrates marine mammals 468 article (author version) fthokunivhus https://doi.org/10.1016/j.dsr2.2007.02.007 2022-11-18T01:01:34Z The Oyashio shelf region and the seasonally ice-covered areas north of Hokkaido are highly productive, supporting a wide range of species including marine mammals, seabirds and commercially important species in the western subarctic Pacific. The fishes include gadids, such as walleye pollock and Pacific cod, and subarctic migratory pelagic fishes such as chum salmon and pink salmon. It is also an important summer feeding ground for subtropical migrants such as the Japanese sardine, Japanese anchovy, Pacific saury, mackerels, Japanese common squid, whales and seabirds. In recent decades, some components of the Oyashio ecosystem (i.e., phytoplankton, mesozooplankton, gadid fish, and subtropical migrants) have shown changes in species abundance or distribution that are correlated with environmental changes such as the 1976/77 and 1988/89 regime shifts. The First Oyashio Intrusion moved northward from the mid 1960s until the late 1970s when it moved southward until the 1980s, after which it returned to the north again after the mid 1990s. The sea surface temperature in spring decreased after the late 1970s, increased after the late 1980s, and remained high during the 1990s. The extent of ice cover in the Sea of Okhostk also decreased during the latest warming in the 1980-90s but has increased again since the late 1990s. These and other kinds of variability are described in this overview of the status of the Oyashio ecosystem and the surrounding region. Article in Journal/Newspaper Pink salmon Subarctic ice covered areas Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Oyashio ENVELOPE(157.000,157.000,50.000,50.000) Pacific Deep Sea Research Part II: Topical Studies in Oceanography 54 23-26 2526 2542 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Oyashio physical and chemical oceanography ecosystem properties fish and invertebrates marine mammals 468 |
spellingShingle |
Oyashio physical and chemical oceanography ecosystem properties fish and invertebrates marine mammals 468 Sakurai, Yasunori An overview of the Oyashio ecosystem |
topic_facet |
Oyashio physical and chemical oceanography ecosystem properties fish and invertebrates marine mammals 468 |
description |
The Oyashio shelf region and the seasonally ice-covered areas north of Hokkaido are highly productive, supporting a wide range of species including marine mammals, seabirds and commercially important species in the western subarctic Pacific. The fishes include gadids, such as walleye pollock and Pacific cod, and subarctic migratory pelagic fishes such as chum salmon and pink salmon. It is also an important summer feeding ground for subtropical migrants such as the Japanese sardine, Japanese anchovy, Pacific saury, mackerels, Japanese common squid, whales and seabirds. In recent decades, some components of the Oyashio ecosystem (i.e., phytoplankton, mesozooplankton, gadid fish, and subtropical migrants) have shown changes in species abundance or distribution that are correlated with environmental changes such as the 1976/77 and 1988/89 regime shifts. The First Oyashio Intrusion moved northward from the mid 1960s until the late 1970s when it moved southward until the 1980s, after which it returned to the north again after the mid 1990s. The sea surface temperature in spring decreased after the late 1970s, increased after the late 1980s, and remained high during the 1990s. The extent of ice cover in the Sea of Okhostk also decreased during the latest warming in the 1980-90s but has increased again since the late 1990s. These and other kinds of variability are described in this overview of the status of the Oyashio ecosystem and the surrounding region. |
format |
Article in Journal/Newspaper |
author |
Sakurai, Yasunori |
author_facet |
Sakurai, Yasunori |
author_sort |
Sakurai, Yasunori |
title |
An overview of the Oyashio ecosystem |
title_short |
An overview of the Oyashio ecosystem |
title_full |
An overview of the Oyashio ecosystem |
title_fullStr |
An overview of the Oyashio ecosystem |
title_full_unstemmed |
An overview of the Oyashio ecosystem |
title_sort |
overview of the oyashio ecosystem |
publisher |
Pergamon |
url |
http://hdl.handle.net/2115/33067 https://doi.org/10.1016/j.dsr2.2007.02.007 |
long_lat |
ENVELOPE(157.000,157.000,50.000,50.000) |
geographic |
Oyashio Pacific |
geographic_facet |
Oyashio Pacific |
genre |
Pink salmon Subarctic ice covered areas |
genre_facet |
Pink salmon Subarctic ice covered areas |
op_relation |
http://www.sciencedirect.com/science/journal/09670645 http://hdl.handle.net/2115/33067 Deep Sea Research. Part 2, Topical Studies in Oceanography, 54(23-26): 2526-2542 http://dx.doi.org/10.1016/j.dsr2.2007.02.007 |
op_doi |
https://doi.org/10.1016/j.dsr2.2007.02.007 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
54 |
container_issue |
23-26 |
container_start_page |
2526 |
op_container_end_page |
2542 |
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1766168520478949376 |